Final answer:
A mortgage is the document that provides evidence of a property pledged as collateral for a loan.
Step-by-step explanation:
The document that provides evidence that a certain property is pledged as collateral for a loan is known as a mortgage. When a borrower takes out a loan, they often provide collateral to the lender to secure the loan. If the borrower fails to repay the loan, the lender has the right to seize the collateral. A mortgage is a legal document that ties the collateral, typically a property or real estate, to the loan, allowing the lender to have a claim on the property if the borrower defaults on the loan payments.